Java FX Loan Calculator

Analysis

• List the locales your application will include
• List the labels included in your resource bundle

Design

Create the UML for your application

Write or rewrite Exercise 5.22 using JavaFX, as shown in the figure below. The program allows the user to set the loan amount, loan period, and interest rate, and displays the corresponding interest, principal, and balance in the currency format.

Add a combo box (drop down) control that allows the user to select between English, Spanish and at least one other locale. see image.

Option: Use a resource bundle to localize the labels and output for each language.

Exercise 5.22 code

public class Exercise05_22 {
public static void main(String[] args) {
java.util.Scanner input = new java.util.Scanner(System.in);

// Enter loan amount
System.out.print(
"Enter loan amount, for example 120000.95: ");
double loanAmount = input.nextDouble();

// Enter number of years
System.out.print(
"Enter number of years as an integer, for example 5: ");
int numOfYears = input.nextInt();

// Enter yearly interest rate
System.out.print("Enter yearly interest rate, for example 8.25: ");
double annualInterestRate = input.nextDouble();

// Obtain monthly interest rate
double monthlyInterestRate = annualInterestRate/1200;

// Compute mortgage
double monthlyPayment = loanAmount*monthlyInterestRate /
(1 - (Math.pow(1 / (1 + monthlyInterestRate), numOfYears * 12)));

double balance = loanAmount;
double interest;
double principal;

System.out.println("Monthly Payment: " + (int)(monthlyPayment * 100) / 100.0 );
System.out.println("Total Payment: " + (int)(monthlyPayment * 12 * numOfYears * 100) / 100.0 + "\n" );

// Display the header
System.out.printf("%-15s%-15s%-15s%-15s\n", "Payment#", "Interest", "Principal", "Balance");
for (int i = 1; i <= numOfYears * 12; i++) {
interest = monthlyInterestRate * balance;
principal = monthlyPayment - interest;
balance = balance - principal;
System.out.printf("%-15d%-15.2f%-15.2f%-15.2f\n", i, interest, principal, balance);
}
}
}